Latest Research

  • Letter |

    Blue light-emitting diodes based on perovskite nanostructures embedded within quasi-two-dimensional phases show highly effective charge injection and suppressed non-radiative recombination.

    • Yang Liu
    • , Jieyuan Cui
    • , Kai Du
    • , He Tian
    • , Zhuofei He
    • , Qiaohui Zhou
    • , Zhaoliang Yang
    • , Yunzhou Deng
    • , Dong Chen
    • , Xiaobing Zuo
    • , Yang Ren
    • , Liang Wang
    • , Haiming Zhu
    • , Baodan Zhao
    • , Dawei Di
    • , Jianpu Wang
    • , Richard H. Friend
    •  & Yizheng Jin
  • Article |

    By synthesizing undistorted cross-sectional image reconstructions from multiple conventional images acquired with angular diversity, optical coherence refraction tomography offers greater than threefold improvement in lateral resolution and speckle reduction in imaging tissue ultrastructure, and reconstructs the tissue’s internal refractive index distribution.

    • Kevin C. Zhou
    • , Ruobing Qian
    • , Simone Degan
    • , Sina Farsiu
    •  & Joseph A. Izatt
  • Article |

    Following excitation with a resonant laser, on-demand generation of non-classical light states in photon-number superpositions of zero-, one- and two-photon Fock states is demonstrated from a GaAs-based cavity containing InAs quantum dots.

    • J. C. Loredo
    • , C. Antón
    • , B. Reznychenko
    • , P. Hilaire
    • , A. Harouri
    • , C. Millet
    • , H. Ollivier
    • , N. Somaschi
    • , L. De Santis
    • , A. Lemaître
    • , I. Sagnes
    • , L. Lanco
    • , A. Auffèves
    • , O. Krebs
    •  & P. Senellart
  • Review Article |

    Acousto-optical interactions within integrated optics platforms are reviewed with a discussion of the useful chip-based devices such as lasers, amplifiers, filters, isolators and more besides that can result.

    • Benjamin J. Eggleton
    • , Christopher G. Poulton
    • , Peter T. Rakich
    • , Michael. J. Steel
    •  & Gaurav Bahl
  • Letter |

    A hybrid material based on uniform graphene on both the outer surface and inner hole walls of a photonic crystal fibre offers a strong, tunable light–matter interaction and good broadband electro-optic modulation performance under low gate voltage.

    • Ke Chen
    • , Xu Zhou
    • , Xu Cheng
    • , Ruixi Qiao
    • , Yi Cheng
    • , Can Liu
    • , Yadian Xie
    • , Wentao Yu
    • , Fengrui Yao
    • , Zhipei Sun
    • , Feng Wang
    • , Kaihui Liu
    •  & Zhongfan Liu
  • Article |

    Lasers based on Landau levels, which should offer wide wavelength tunability, including across the elusive THz range, are a step closer to reality with a demonstration showing how to suppress the main loss mechanism.

    • D. B. But
    • , M. Mittendorff
    • , C. Consejo
    • , F. Teppe
    • , N. N. Mikhailov
    • , S. A. Dvoretskii
    • , C. Faugeras
    • , S. Winnerl
    • , M. Helm
    • , W. Knap
    • , M. Potemski
    •  & M. Orlita
  • Letter |

    A sender and a receiver for continuous-variable quantum key distribution are packed onto separate silicon photonic chips. By using an external 1,550-nm laser, a secret key rate of 0.14 kbps is transmitted over a simulated distance of 100 km in fibre.

    • G. Zhang
    • , J. Y. Haw
    • , H. Cai
    • , F. Xu
    • , S. M. Assad
    • , J. F. Fitzsimons
    • , X. Zhou
    • , Y. Zhang
    • , S. Yu
    • , J. Wu
    • , W. Ser
    • , L. C. Kwek
    •  & A. Q. Liu
  • Article |

    Single-photon sources with a single-photon efficiency of 0.60, a single-photon purity of 0.975 and an indistinguishability of 0.975 are demonstrated. This is achieved by fabricating elliptical resonators around site-registered quantum dots.

    • Hui Wang
    • , Yu-Ming He
    • , T.-H. Chung
    • , Hai Hu
    • , Ying Yu
    • , Si Chen
    • , Xing Ding
    • , M.-C. Chen
    • , Jian Qin
    • , Xiaoxia Yang
    • , Run-Ze Liu
    • , Z.-C. Duan
    • , J.-P. Li
    • , S. Gerhardt
    • , K. Winkler
    • , J. Jurkat
    • , Lin-Jun Wang
    • , Niels Gregersen
    • , Yong-Heng Huo
    • , Qing Dai
    • , Siyuan Yu
    • , Sven Höfling
    • , Chao-Yang Lu
    •  & Jian-Wei Pan
  • Article |

    By using an ultrastable oscillator based on a cryogenic Si cavity, the fractional instability of two Sr optical lattice clocks at 1 s reaches 4.8 × 10−17 and 3.5 × 10−17 through anti-synchronous and synchronous comparisons, respectively.

    • E. Oelker
    • , R. B. Hutson
    • , C. J. Kennedy
    • , L. Sonderhouse
    • , T. Bothwell
    • , A. Goban
    • , D. Kedar
    • , C. Sanner
    • , J. M. Robinson
    • , G. E. Marti
    • , D. G. Matei
    • , T. Legero
    • , M. Giunta
    • , R. Holzwarth
    • , F. Riehle
    • , U. Sterr
    •  & J. Ye
  • Article |

    Using microheaters and a genetic algorithm optimization, deterministic phase-front shaping through a planar thermo-optical module can be realized, complementing the existing optical shaping toolbox by offering low-chromatic-aberration, polarization-insensitive and transmission-mode components.

    • Pascal Berto
    • , Laurent Philippet
    • , Johann Osmond
    • , Chang François Liu
    • , Adeel Afridi
    • , Marc Montagut Marques
    • , Bernat Molero Agudo
    • , Gilles Tessier
    •  & Romain Quidant
  • Article |

    Intracellular laser particles based on silica-coated semiconductor microcavities with distinct emission wavelengths allow real-time tracking of thousands of cells in a tumour model.

    • Nicola Martino
    • , Sheldon J. J. Kwok
    • , Andreas C. Liapis
    • , Sarah Forward
    • , Hoon Jang
    • , Hwi-Min Kim
    • , Sarah J. Wu
    • , Jiamin Wu
    • , Paul H. Dannenberg
    • , Sun-Joo Jang
    • , Yong-Hee Lee
    •  & Seok-Hyun Yun
  • Letter |

    A high-speed wireless THz communication link is seamlessly integrated into a fibre-optic network. The demonstration relies on an ultra-broadband modulator exploiting two-dimensionally localized gap plasmons for direct conversion of the THz signals to the optical domain.

    • S. Ummethala
    • , T. Harter
    • , K. Koehnle
    • , Z. Li
    • , S. Muehlbrandt
    • , Y. Kutuvantavida
    • , J. Kemal
    • , P. Marin-Palomo
    • , J. Schaefer
    • , A. Tessmann
    • , S. K. Garlapati
    • , A. Bacher
    • , L. Hahn
    • , M. Walther
    • , T. Zwick
    • , S. Randel
    • , W. Freude
    •  & C. Koos
  • Article |

    Through degenerate Kerr four-wave mixing in ultrahigh-Q crystalline microresonators made of magnesium fluoride, tunable conversion of a compact, low-power telecommunications laser over an entire optical octave from 1,083 nm to 2,670 nm, with signatures of mid-infrared sidebands at almost 4,000 nm, is shown.

    • Noel Lito B. Sayson
    • , Toby Bi
    • , Vincent Ng
    • , Hoan Pham
    • , Luke S. Trainor
    • , Harald G. L. Schwefel
    • , Stéphane Coen
    • , Miro Erkintalo
    •  & Stuart G. Murdoch
  • Article |

    Video-rate imaging of the brains of awake mice with a field of view of 10 × 12 mm2 and a spatial resolution of 1.2 µm is accomplished.

    • Jingtao Fan
    • , Jinli Suo
    • , Jiamin Wu
    • , Hao Xie
    • , Yibing Shen
    • , Feng Chen
    • , Guijin Wang
    • , Liangcai Cao
    • , Guofan Jin
    • , Quansheng He
    • , Tianfu Li
    • , Guoming Luan
    • , Lingjie Kong
    • , Zhenrong Zheng
    •  & Qionghai Dai
  • Article |

    Combining resonant enhancement with nanophotonic mode engineering in a silicon nitride microring resonator allows spectral translation of a continuous-wave signal from the telecom band (~1,550 nm) to the visible band (~650 nm) through cavity-enhanced four-wave mixing with a translation efficiency of (30.1 ± 2.8)% at a pump power of (329 ± 13) μW.

    • Xiyuan Lu
    • , Gregory Moille
    • , Qing Li
    • , Daron A. Westly
    • , Anshuman Singh
    • , Ashutosh Rao
    • , Su-Peng Yu
    • , Travis C. Briles
    • , Scott B. Papp
    •  & Kartik Srinivasan
  • Article |

    An all-photonic quantum repeater is demonstrated by manipulating state-of-the-art 12-photon interferometry. The enhancement of entanglement-generation rate compared with parallel entanglement swapping proves the feasibility of the concept.

    • Zheng-Da Li
    • , Rui Zhang
    • , Xu-Fei Yin
    • , Li-Zheng Liu
    • , Yi Hu
    • , Yu-Qiang Fang
    • , Yue-Yang Fei
    • , Xiao Jiang
    • , Jun Zhang
    • , Li Li
    • , Nai-Le Liu
    • , Feihu Xu
    • , Yu-Ao Chen
    •  & Jian-Wei Pan
  • Article |

    The distribution of Berry charge over a ring of exceptional points, called a Weyl exceptional ring, is experimentally demonstrated.

    • Alexander Cerjan
    • , Sheng Huang
    • , Mohan Wang
    • , Kevin P. Chen
    • , Yidong Chong
    •  & Mikael C. Rechtsman
  • Article |

    The combined technique of dual-comb multi-heterodyne detection and Fourier-transform analysis allows simultaneous acquisition and monitoring of the phase pattern of a generic frequency comb demonstrating the high degree of coherence of the emission of two quantum cascade laser frequency combs.

    • Francesco Cappelli
    • , Luigi Consolino
    • , Giulio Campo
    • , Iacopo Galli
    • , Davide Mazzotti
    • , Annamaria Campa
    • , Mario Siciliani de Cumis
    • , Pablo Cancio Pastor
    • , Roberto Eramo
    • , Markus Rösch
    • , Mattias Beck
    • , Giacomo Scalari
    • , Jérôme Faist
    • , Paolo De Natale
    •  & Saverio Bartalini
  • Letter |

    By using a single-quantum-well active region with a unique well–cladding design to suppress non-radiative recombination and enhance radiative recombination, light-emitting diodes with close to unity internal quantum efficiency at a low current density of <10−4 A cm−2 are demonstrated.

    • Ning Li
    • , Kevin Han
    • , William Spratt
    • , Stephen Bedell
    • , John Ott
    • , Marinus Hopstaken
    • , Frank Libsch
    • , Qinglong Li
    •  & Devendra Sadana
  • Article |

    A method to control the polarization of a Compton gamma-ray beam is developed. By using a free-electron laser oscillator with two helical undulator magnets of opposite helicities, Compton gamma-ray beams with a polarizability of 0.97 are generated.

    • Jun Yan
    • , Jonathan M. Mueller
    • , Mohammad W. Ahmed
    • , Hao Hao
    • , Senlin Huang
    • , Jingyi Li
    • , Vladimir N. Litvinenko
    • , Peifan Liu
    • , Stepan F. Mikhailov
    • , Victor G. Popov
    • , Mark H. Sikora
    • , Nikolay A. Vinokurov
    •  & Ying K. Wu
  • Letter |

    A higher-order topological phase is demonstrated, manifesting as robust, topologically protected corner modes in a silicon photonics system.

    • Sunil Mittal
    • , Venkata Vikram Orre
    • , Guanyu Zhu
    • , Maxim A. Gorlach
    • , Alexander Poddubny
    •  & Mohammad Hafezi
  • Article |

    The polarization structure around polarization singularities can exhibit arbitrary fractional rotations when tracing around the singularity, due to an underlying topology of a torus knot imprinted by the chosen ratio of frequencies contained in the light beam.

    • Emilio Pisanty
    • , Gerard J. Machado
    • , Verónica Vicuña-Hernández
    • , Antonio Picón
    • , Alessio Celi
    • , Juan P. Torres
    •  & Maciej Lewenstein
  • Article |

    A two-step sequential broadband nanofocusing technique offers an external efficiency of ~50% over nearly all the visible range on a fibre-coupled plasmonic nanowire probe. Its integration with a scanning tunnelling microscope realizes lens-free tip-enhanced Raman spectroscopy with 1 nm spatial resolution.

    • Sanggon Kim
    • , Ning Yu
    • , Xuezhi Ma
    • , Yangzhi Zhu
    • , Qiushi Liu
    • , Ming Liu
    •  & Ruoxue Yan
  • Article |

    Femtosecond laser pulses can generate self-organized nonlinear gratings in nanophotonic waveguides, providing both quasi-phase-matching and group-velocity matching for second-harmonic generation, and enabling simultaneous χ2 and χ3 nonlinear processes for laser-frequency-comb stabilization.

    • Daniel D. Hickstein
    • , David R. Carlson
    • , Haridas Mundoor
    • , Jacob B. Khurgin
    • , Kartik Srinivasan
    • , Daron Westly
    • , Abijith Kowligy
    • , Ivan I. Smalyukh
    • , Scott A. Diddams
    •  & Scott B. Papp
  • Article |

    The photo-instability of perovskite solar cells is investigated and controlled by the use of a passivation strategy.

    • Silvia G. Motti
    • , Daniele Meggiolaro
    • , Alex J. Barker
    • , Edoardo Mosconi
    • , Carlo Andrea Riccardo Perini
    • , James M. Ball
    • , Marina Gandini
    • , Min Kim
    • , Filippo De Angelis
    •  & Annamaria Petrozza
  • Article |

    By combining a single-photon time-of-flight camera with computational processing of the spatial and full temporal photon distribution data, an object embedded inside a strongly diffusive medium can be imaged over more than 80 transport mean free paths in a contactless manner on the timescale of the order of 1 s.

    • Ashley Lyons
    • , Francesco Tonolini
    • , Alessandro Boccolini
    • , Audrey Repetti
    • , Robert Henderson
    • , Yves Wiaux
    •  & Daniele Faccio
  • Letter |

    By time-shifting short-pulse excitation photon energy into prolonged luminescent emission in the time domain, both the number of light signal transducers in sub-15 nm nanoparticles and the near-infrared-in to near-infrared-out conversion efficiency can be maximized, advancing in vivo optical bioimaging.

    • Yuyang Gu
    • , Zhiyong Guo
    • , Wei Yuan
    • , Mengya Kong
    • , Yulai Liu
    • , Yongtao Liu
    • , Yilin Gao
    • , Wei Feng
    • , Fan Wang
    • , Jiajia Zhou
    • , Dayong Jin
    •  & Fuyou Li
  • Letter |

    Transduction of valley information to mechanical states in a monolayer MoS2 resonator can be realized by optically pumping the valley carriers and applying an out-of-plane magnetic field gradient to induce a displacement-dependent valley splitting.

    • Hao-Kun Li
    • , King Yan Fong
    • , Hanyu Zhu
    • , Quanwei Li
    • , Siqi Wang
    • , Sui Yang
    • , Yuan Wang
    •  & Xiang Zhang
  • Article |

    Two optical signatures of amyloid fibres—luminescence in the blue and a near-infrared signal, which can be observed in in vitro and in vivo tissues—are reported. The findings allow for staining-free characterization of amyloid deposits in human samples and could open the door to innovative diagnostic strategies for neurodegenerative diseases.

    • Jonathan Pansieri
    • , Véronique Josserand
    • , Sun-Jae Lee
    • , Anaëlle Rongier
    • , Daniel Imbert
    • , Marcelle Moulin Sallanon
    • , Enikö Kövari
    • , Thomas G. Dane
    • , Charlotte Vendrely
    • , Odette Chaix-Pluchery
    • , Mélanie Guidetti
    • , Julien Vollaire
    • , Arnold Fertin
    • , Yves Usson
    • , Patrice Rannou
    • , Jean-Luc Coll
    • , Christel Marquette
    •  & Vincent Forge
  • Article |

    Photoacoustic detection highly localized with a pulsed ultraviolet laser based on the Grüneisen relaxation effect allows water-background suppressed mid-infrared (MIR) imaging of lipids and proteins at ultraviolet resolution, at least an order of magnitude finer than the MIR diffraction limits.

    • Junhui Shi
    • , Terence T. W. Wong
    • , Yun He
    • , Lei Li
    • , Ruiying Zhang
    • , Christopher S. Yung
    • , Jeeseong Hwang
    • , Konstantin Maslov
    •  & Lihong V. Wang
  • Article |

    Efficient power transfer from the pump to the soliton can be achieved through field coupling between two optical resonators, allowing soliton frequency comb generation with tens-to-hundreds-of-fold improvement in conversion efficiency compared with a traditional single-resonator comb.

    • Xiaoxiao Xue
    • , Xiaoping Zheng
    •  & Bingkun Zhou
  • Article |

    All-optical control of the topological excitations of a superfluid of light is demonstrated in a high-quality-factor semiconductor microcavity. Recovery of superfluid behaviour at high polariton densities and bosonic Josephson vortices are observed.

    • Davide Caputo
    • , Nataliya Bobrovska
    • , Dario Ballarini
    • , Michal Matuszewski
    • , Milena De Giorgi
    • , Lorenzo Dominici
    • , Kenneth West
    • , Loren N. Pfeiffer
    • , Giuseppe Gigli
    •  & Daniele Sanvitto
  • Article |

    Echo-enabled harmonic generation in a free-electron laser enables 45th harmonic pulses from a 264 nm wavelength seed, yielding 5.9 nm wavelength coherent output.

    • Primož Rebernik Ribič
    • , Alessandro Abrami
    • , Laura Badano
    • , Maurizio Bossi
    • , Hans-Heinrich Braun
    • , Niky Bruchon
    • , Flavio Capotondi
    • , Davide Castronovo
    • , Marco Cautero
    • , Paolo Cinquegrana
    • , Marcello Coreno
    • , Marie Emmanuelle Couprie
    • , Ivan Cudin
    • , Miltcho Boyanov Danailov
    • , Giovanni De Ninno
    • , Alexander Demidovich
    • , Simone Di Mitri
    • , Bruno Diviacco
    • , William M. Fawley
    • , Chao Feng
    • , Mario Ferianis
    • , Eugenio Ferrari
    • , Laura Foglia
    • , Fabio Frassetto
    • , Giulio Gaio
    • , David Garzella
    • , Amin Ghaith
    • , Fabio Giacuzzo
    • , Luca Giannessi
    • , Vanessa Grattoni
    • , Sandi Grulja
    • , Erik Hemsing
    • , Fatma Iazzourene
    • , Gabor Kurdi
    • , Marco Lonza
    • , Nicola Mahne
    • , Marco Malvestuto
    • , Michele Manfredda
    • , Claudio Masciovecchio
    • , Paolo Miotti
    • , Najmeh S. Mirian
    • , Ivaylo Petrov Nikolov
    • , Giuseppe Maria Penco
    • , Gregory Penn
    • , Luca Poletto
    • , Mihai Pop
    • , Eduard Prat
    • , Emiliano Principi
    • , Lorenzo Raimondi
    • , Sven Reiche
    • , Eléonore Roussel
    • , Roberto Sauro
    • , Claudio Scafuri
    • , Paolo Sigalotti
    • , Simone Spampinati
    • , Carlo Spezzani
    • , Luca Sturari
    • , Michele Svandrlik
    • , Takanori Tanikawa
    • , Mauro Trovó
    • , Marco Veronese
    • , Davide Vivoda
    • , Dao Xiang
    • , Maurizio Zaccaria
    • , Dino Zangrando
    • , Marco Zangrando
    •  & Enrico Massimiliano Allaria
  • Article |

    Optical soliton dynamics in large-core hollow capillary fibres is demonstrated. The findings enable the scaling of soliton effects by several orders of magnitude to the multi-millijoule energy and terawatt peak power levels, and open up opportunities for new-generation table-top light sources for ultrafast strong-field physics and advanced spectroscopy.

    • John C. Travers
    • , Teodora F. Grigorova
    • , Christian Brahms
    •  & Federico Belli
  • Article |

    Stereo images of gold nanoparticles in a pyramid shape are reconstructed from X-ray coherent diffraction patterns. Depth information is retrieved by computing disparity maps without a priori knowledge of the sample shape.

    • J. Duarte
    • , R. Cassin
    • , J. Huijts
    • , B. Iwan
    • , F. Fortuna
    • , L. Delbecq
    • , H. Chapman
    • , M. Fajardo
    • , M. Kovacev
    • , W. Boutu
    •  & H. Merdji
  • Article |

    Interferometric scattering microscopy is employed to track proteins in live cell membranes, demonstrating tracking of transmembrane epidermal growth factor receptors with nanometre precision in all three dimensions at up to microsecond speeds and for durations of tens of minutes.

    • Richard W. Taylor
    • , Reza Gholami Mahmoodabadi
    • , Verena Rauschenberger
    • , Andreas Giessl
    • , Alexandra Schambony
    •  & Vahid Sandoghdar
  • Letter |

    It is possible to regulate random lasers by controlling and manipulating their properties, including the number and spatial positions of their lasing modes, and the lasing wavelength and the modal size over wide ranges. Performances comparable with non-random optical cavities with 2D photonic crystals are reported.

    • Myungjae Lee
    • , Ségolène Callard
    • , Christian Seassal
    •  & Heonsu Jeon